Fig. 1. Schematic diagram of the PEM structure and its vibration

Fig. 2. Schematic diagram of the composite resonant network of a high-voltage resonant circuit and PEM

Fig. 3. Variation curve of the voltage acrossL0 with frequency

Fig. 4. Structure block diagram of the resonant self-tracking system

Fig. 5. Control flow chart of the software

Fig. 6. Test system structure diagram

Fig. 7. Correspondence between J₄/J₂ and modulation amplitudeδ0

Fig. 8. Frequency sweep test results

Fig. 9. Phase modulation amplitude change with and without frequency tracking

Fig. 10. PEM resonance frequency curve

Fig. 11. Test results at typical temperature